Electric-arc-lamp carbon



(No' Model.) 2 Sheets-Sheet 1.

G. M. LANE. ELBOTRIG ARC LAMP CARBON.

WITNESSES:

ATTORNEK ,1 THE ncmms PETERS co. PHOTOUTHQ. wmmoron, u. c.

(No Model.) 2 Sheets-Sheet 2. G. M. LANE. ELECTRIC ARC LAMP CARBON.

Patented Apr. 11, 1893.

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In: NORRH PETERS coy. Puma-1.11040" wAsnmamm u. c.

UNITED STATES PATENT OFFICE.

GEORGE MUNROE LANE, OF ASBURY PARK, NE JERSEY.

ELECTRlC-ARC-LAMP CARBON.

SPECIFICATION forming part of Letters Patent No. 495,463, dated April 11, 1893.

Application filed September 11, 1890. $erial No. 364,634. (No model.)

To aZZ whom it may concern.-

Be it known that I, GEORGE MUNROE LANE, a citizen of the United States, residing at Asbury Park,.in the county of Monmouth and State of New Jersey, have invented certain new and useful Improvements in Electric- Light Garbons; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to carbons for electric arc lamps.

The purpose of the invention is to provide a carbon of long life and which will burn steady and uniformly and combine the advantages of the ordinary pencil carbons, and obviate the use of two or more pencils in one holder, or the employment of double lamps.

It is an established fact that the best results are obtained in electric arc lighting by the use of round carbons about one-half inch in diameter, as in carbons of larger size or flat carbons the crater is constantly shifting thus producing an unsteady light. Again where two or more carbons are inserted in the same holder the light jumps suddenly from one to the other and produces a flickering and inconstant light.

The improvement consists in two or more carbon pencils placed in parallel position and united by an intermediate web portion. One of the pencils is longer than the rest to form the are on the passage of the current. The pencils are united by a solid portion at the end designed to enter the holder to give stability to the carbon and prevent breakage in handling and shipping.

The improvement further consists in the novel features which will be hereinafter more fully described and claimed and which are shown in the annexed drawings, in which;

Figure 1. is a side view of a carbon embodying my invention. Fig. 2. is adetail view of the opposing ends of two carbons, showing their relative position in a trimmed lamp. Fig. 3. is a cross section of a carbon. Fig. 4 is a view showing the application of the carbon to a lamp of well known construction, the lamp being of the continuous circuit type.

The carbon is composed of a series of two or more, two being shown, carbon pencils A A which are arrangedin parallel position and which are united by an intermediate web portion a. The series of carbon pencils are united at. one end, that designed to enter the holder, by a solid portion B which reinforces the web a and prevents a separation of the pencils in handling or shipping. One of the pencils is longer than the balance to form the are on the current being established. The web a serves to connect the pencils and acts in the capacity of a conductor to transfer the are from one pencil to the other without effecting any break or sudden jump.

Within the spirit of this invention it is essential that the carbons when in use, be in direct circuit and in perfect alignment the same as the carbon pencils of ordinary arc lamps. The best results are obtained by using the carbons in arc lamps such as shown in Fig. 4: which is of the continuous circuit type; however the carbons can be used in lamps in which it is possible to use the ordinary carbon pencil, it being essential that the carbon be included in and form part of the direct circuit. Hence, it will be seen on reference to Fig. 4 that the carbons are in alignment and are included in and form part of the circuit, the current entering at binding post 0 and passing through the frame D to the holder E, through the upper and the lower carbons, to regulator F through main magnet G and out at H in the usual manner.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. The combination with an arc lamp, of two carbon electrodes between which the arc is formed in alignment and in direct circuit, each electrode being composed of a series of carbon pencils placed in parallel position and united by a web portion, whereby the arc travels from one pair of opposing pencils to an adjacent pair by means of the connecting web portion, substantially as described.

2. An electric arc lamp carbon composed of a series of carbon pencils placed in parallel position and united at one end by a solid portion and the remainder of its length by a web portion, substantially as set forth.

3. An electric arc lamp carbon composed of a series of carbon pencils placed in parallel position and united by a web portion, and having one carbon pencil longer than the rest, substantially as and for the purpose described.

4. The combination of two electrodes constituting the opposite terminals of the lamp, each consisting of two or more pencils in electrical connection along longitudinal edges,

and feeding mechanism therefor, substan- 1o tially as described.

5. An arc lamp carbon composed of a series of carbon pencils placed in parallel position and united at one end by a solid portion integral with the pencils.

In testimony whereof I affix my signature in I 5 presence of two Witnesses.

GEORGE MUNROE LANE. Witnesses:

J. W. ROCKAFELLER, J. O. BERRANG. 

